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Drill Size Chart

Drill sizes to 1" diameter

Legend
Fractional Inch
Letter Drill
Millimeters
Number Drill
Millimeters
Inches
Designation
 
Millimeters
Inches
Designation
 
Millimeters
Inches
Designation
.3429mm .0135"
#80
  3.6576mm .144"
#27
  9.5mm .374"
.3683mm .0145"
#79
  3.7mm .1457"
  9.525mm .375"
3/8"
.3969mm .015625"
1/64"
  3.7338mm .147"
#26
  9.5758mm .377"
V
.4064mm .016"
#78
  3.7973mm .1495"
#25
  9.8044mm .386"
W
.4572mm .018"
#77
  3.8608mm .152"
#24
  9.9219mm .390625"
25/64"
.5mm .0197"
  3.9116mm .154"
#23
  10mm .3937"
.508mm .02"
#76
  3.9688mm .15625"
5/32"
  10.0838mm .397"
X
.5334mm .021"
#75
  3.9878mm .157"
#22
  10.2mm .4016"
.5715mm .0225"
#74
  4mm .1575"
  10.2616mm .404"
Y
.6096mm .024"
#73
  4.0386mm .159"
#21
  10.3188mm .40625"
13/32"
.635mm .025"
#72
  4.0894mm .161"
#20
  10.4902mm .413"
Z
.6604mm .026"
#71
  4.2mm .1654"
  10.5mm .4134"
.7112mm .028"
#70
  4.2164mm .166"
#19
  10.7156mm .421875"
27/64"
.74168mm .0292"
#69
  4.3053mm .1695"
#18
  11mm .4331"
.75mm .0295"
  4.3656mm .171875"
11/64"
  11.1125mm .4375"
7/16"
.7874mm .031"
#68
  4.3942mm .173"
#17
  11.25mm .4429"
.7938mm .03125"
1/32"
  4.4958mm .177"
#16
  11.5mm .4528"
.8128mm .032"
#67
  4.5mm .1772"
  11.5094mm .453125"
29/64"
.8382mm .033"
#66
  4.572mm .18"
#15
  11.9063mm .46875"
15/32"
.85mm .0335"
  4.6228mm .182"
#14
  12mm .4724"
.889mm .035"
#65
  4.699mm .185"
#13
  12.3031mm .484375"
31/64"
.9144mm .036"
#64
  4.7625mm .1875"
3/16"
  12.5mm .4921"
.9398mm .037"
#63
  4.8006mm .189"
#12
  12.7mm .5"
1/2"
.95mm .0374"
  4.8514mm .191"
#11
  12.8mm .5039"
.9652mm .038"
#62
  4.9149mm .1935"
#10
  13mm .5118"
.9906mm .039"
#61
  4.9784mm .196"
# 9
  13.0969mm .515625"
33/64"
1mm .0394"
  5mm .1969"
  13.4938mm .53125"
17/32"
1.016mm .04"
#60
  5.0546mm .199"
# 8
  13.5mm .5315"
1.0414mm .041"
#59
  5.1054mm .201"
# 7
  13.8906mm .546875"
35/64"
1.0668mm .042"
#58
  5.1594mm .203125"
13/64"
  14mm .5512"
1.0922mm .043"
#57
  5.1816mm .204"
# 6
  14.2875mm .5625"
9/16"
1.1mm .0433"
  5.2197mm .2055"
# 5
  14.5mm .5709"
1.1811mm .0465"
#56
  5.25mm .2067"
  14.6844mm .578125"
37/64"
1.1906mm .046875"
3/64"
  5.3086mm .209"
# 4
  15mm .5906"
1.25mm .0492"
  5.4102mm .213"
# 3
  15.0813mm .59375"
19/32"
1.3mm .0512"
  5.5mm .2165"
  15.4781mm .609375"
39/64"
1.3208mm .052"
#55
  5.5563mm .21875"
7/32"
  15.5mm .6102"
1.397mm .055"
#54
  5.6134mm .221"
# 2
  15.875mm .625"
5/8"
1.45mm .0571"
  5.7912mm .228"
# 1
  16mm .6299"
1.5mm .0591"
  5.9436mm .234"
A
  16.2719mm .640625"
41/64"
1.5113mm .0595"
#53
  5.9531mm .234375"
15/64"
  16.5mm .6496"
1.5875mm .0625"
1/16"
  6mm .2362"
  16.6688mm .65625"
21/32"
1.6mm .063"
  6.0452mm .238"
B
  17mm .6693"
1.6129mm .0635"
#52
  6.1468mm .242"
C
  17.0656mm .671875"
43/64"
1.7018mm .067"
#51
  6.2484mm .246"
D
  17.4625mm .6875"
11/16"
1.75mm .0689"
  6.25mm .2461"
  17.5mm .689"
1.778mm .07"
#50
  6.35mm .25"
1/4"
  17.8594mm .703125"
45/64"
1.8542mm .073"
#49
  6.35mm .25"
E
  18mm .7087"
1.9304mm .076"
#48
  6.5mm .2559"
  18.2563mm .71875"
23/32"
1.9844mm .078125"
5/64"
  6.5278mm .257"
F
  18.5mm .7283"
1.9939mm .0785"
#47
  6.6294mm .261"
G
  18.6531mm .734375"
47/64"
2mm .0787"
  6.7469mm .265625"
17/64"
  19mm .748"
2.05mm .0807"
  6.7564mm .266"
H
  19.05mm .75"
3/4"
2.0574mm .081"
#46
  6.8mm .2677"
  19.4469mm .765625"
49/64"
2.0828mm .082"
#45
  6.9088mm .272"
I
  19.5mm .7677"
2.1844mm .086"
#44
  7mm .2756"
  19.8438mm .78125"
25/32"
2.2606mm .089"
#43
  7.0358mm .277"
J
  20mm .7874"
2.3749mm .0935"
#42
  7.1374mm .281"
K
  20.2406mm .796875"
51/64"
2.3813mm .09375"
3/32"
  7.1438mm .28125"
9/32"
  20.5mm .8071"
2.4384mm .096"
#41
  7.25mm .2854"
  20.6375mm .8125"
13/16"
2.4892mm .098"
#40
  7.366mm .29"
L
  21mm .8268"
2.5mm .0984"
  7.493mm .295"
M
  21.0344mm .828125"
53/64"
2.5273mm .0995"
#39
  7.5mm .2953"
  21.4313mm .84375"
27/32"
2.5781mm .1015"
#38
  7.5406mm .296875"
19/64"
  21.5mm .8465"
2.6416mm .104"
#37
  7.6708mm .302"
N
  21.8281mm .859375"
55/64"
2.7051mm .1065"
#36
  7.8mm .3071"
  22mm .8661"
2.7781mm .109375"
7/64"
  7.9375mm .3125"
5/16"
  22.225mm .875"
7/8"
2.794mm .11"
#35
  8mm .315"
  22.5mm .8858"
2.8194mm .111"
#34
  8.0264mm .316"
O
  22.6219mm .890625"
57/64"
2.8702mm .113"
#33
  8.2042mm .323"
P
  23mm .9055"
2.9mm .1142"
  8.3344mm .328125"
21/64"
  23.0188mm .90625"
29/32"
2.9464mm .116"
#32
  8.4328mm .332"
Q
  23.4156mm .921875"
59/64"
3mm .1181"
  8.5mm .3346"
  23.5mm .9252"
3.048mm .12"
#31
  8.6106mm .339"
R
  23.8125mm .9375"
15/16"
3.175mm .125"
1/8"
  8.7313mm .34375"
11/32"
  24mm .9449"
3.2639mm .1285"
#30
  8.8mm .3465"
  24.2094mm .953125"
61/64"
3.3mm .1299"
  8.8392mm .348"
S
  24.5mm .9646"
3.4544mm .136"
#29
  9mm .3543"
  24.6063mm .96875"
31/32"
3.5mm .1378"
  9.0932mm .358"
T
  25mm .9843"
3.5687mm .1405"
#28
  9.1281mm .359375"
23/64"
  25.0031mm .984375"
63/64"
3.5719mm .140625"
9/64"
  9.25mm .3642"
  25.4mm 1.000"
1"
3.6mm .1417"
  9.3472mm .368"
U
     

MIT-2928

TEKTON 14-pc. Power Nut Driver Bit Set
TEKTON 14-pc. Power Nut Driver Bit Set
List Price: $8.13US
Your Price $5.42US/EA
In Stock

 
 
 

JT69WGK

Eye Glass Repair Kit, Professional
Eye Glass Repair Kit, Professional
List Price: $26.00US
Your Price $21.87US/KIT
No Stock

 
 
 

JT6227

Watch Repair Tool Kit, 16 Pc
Watch Repair Tool Kit, 16 Pc
List Price: $49.28US
Your Price $39.70US/EA
In Stock